FR2630922A2 - Safety binding device for ski boots on a snowboard, with synchronized release on both feet - Google Patents

Abstract

Safety binding device for ski boots on a snowboard, with synchronized release on both feet. It comprises two bindings I, II connected by a sheathed cable 6, 10. Each binding has: a plate 1 for holding it on IV, an anchoring for the tip of the sole 2, 3, 4, a support 5 for the heel. The cable 6 forms arches whose summit traverses a heelpiece 7 which bears, with leaning, against the rear lip (rim) of the heel, traverses a system III which has the functions of momentarily preventing sliding of the cable 6 when fitting the boot and of releasing the feet from IV when a boot exerts too great a force on 7. When one of the feet is subjected to a twisting moment exceeding an adjustable value, forces are induced on one of the stops 4 and the heelpiece 7, which results in pivoting of 4 and suppression of the leaning of 7, and the foot is thus released; the cable 6 is then relaxed and enables the other foot to be removed from its binding.

Description

The present request for certificate of addition is attached to patent application ne8716539 concerning a device for safety bindings, for ski boots on a snowboard, 9 synchronous release on both feet.

Its purpose is a series of modifications aimed at improving:
- triggering of safety in the event of lateral falls on the front and rear of the board;
- locking the system (III) and its use;
- the system for adjusting the position of the supports (2,5) on the connection plate (1).

The modified parts are:
- the lateral stops (4);
- the front stop (3);
- the support connection system (2,5) on the plate (1);
- the connection of the heel piece (7) with the support (5);
- the system (III).

The accompanying drawings illustrate, by way of nonlimiting example, an embodiment of the modified device according to the invention, together with the description below.

 Figure 1 shows, schematically, in top view, the entire device mounted on the surf.

 Figure 2 shows, in top view section A-A, the fixing (II).

 Figure 3 shows, in profile view B-B section, the fixing (II).

 Figure 4 shows, in front view, the front anchoring system of the shoe.

 Figure 5 shows, in rear view, the anchoring system of the heel of the shoe.

 Figure 6 shows, in front view section D-D, the system (III).

 Figure 7 shows, in sectional view C-C, the system (III).

 Figure 8 shows, in top view local section, the different configurations of the system (III).

 The safety system of the device described in the main patent triggers synchronously when one or both feet are subjected to a torsional coupling exerted in a plane parallel to the plane formed by the bottom of the sole of the shoe.

In the case of lateral falls, on the front or rear of the board, this torque occurs in a plane which can be perpendicular to the plane of the sole and parallel to the longitudinal axis of the board. For this type of fall, safety cannot be triggered because of the front stop (3) whose shape prevents any rotation in this plane.

To obviate this drawback, the shoe tip anchoring system has been modified
In the initial device, the lateral stops (4) are in contact with the lateral faces of the sole by
through the adjusting screws (26). In the modified device the stops (4) form a vee which is in contact with '
the rounded shape of the tip of the shoe, located above the sole; it thus prevents the foot from lifting and moving laterally; this modification has the advantage of eliminating the adjustment screws (26) of the initial device.

In the case of a lateral fall, each shoe must be able to pivot relative to an axis materialized by one of the lateral edges of the soles
This pivoting takes place if the upward vertical forces induced on one of the stops (4) and the heel piece (7) exceed a value adjustable by the springs (24,9); it results in the lifting of the opposite lateral edge of the sole.

This uprising causes:
- the rotation of one of the stops (4) relative to its hinge axis (22) and thus frees the front of the foot.

 - a pull on the cable (15) which eliminates the arching of the heel (7); the target (6) is then relaxed allowing the other foot to come out of its fixation.

In the initial device (fig: 3,5), the cable (15) is anchored at a single point on the support (5) by means of the screw (17). In the modified device (fig: 3.5), the anchoring of (15) takes place at two points of (5) located symmetrically with respect to the longitudinal axis of the attachment; this so that the heel-bridging threshold (7) is the same in front or rear lateral fall.

 If during a fall, security being about to trigger, the user manages to regain his balance, the underside of the sole of the shoe comes to press on a part of (4) which resets this one in his system indexing (23,24,25).

 In the initial device (fig: 3), the front stop (3) prevents the foot from advancing and lifting. In the modified device (fig: 3), the front stop (3) 'only prevents the foot from advancing to avoid untimely pivoting of the stops (4) which, in the absence of the front stop (3), would be subject to forces due to the front edge grip and the thrust of the bracing system acting on the heel of the shoe. The position of the stop (3), must therefore be further adjusted, so as to be in contact with the front face of the toe of the sole, when the stops (4) are supported on the rounded shape of the toe of the shoe. .The upper part of the stop (3) has therefore been modified to allow the tip of the shoe to lift.

The position of the stop indexing system (4), defined by the axis XX ', can be placed along the axis YY' (fig: 2); this in order to make the front part of the binding more compact.

The system (III) of the initial device (fig: 1) has been modified to avoid inadvertent closing of the cover (18), due to the dynamic effects generated by the impacts of the surf on the runway and to avoid the snow cover of the witness (8 ) whose sliding in (21) could be hindered.

 The system has been modified as shown in figures: 6,7,8.

 The indicator (8), made integral with (6) by the screw (31), may or may not slide in the body (21), depending on whether the lever (40) is in one of the configurations explained (fig: 8) .

Before fitting, the lever (40) is in a position such that the indexing finger (37), pushes by the spring (38), immobilizes in translation the indicator (8) by penetrating into an orifice provided in the latter.

 After having fitted, the user positions the lever (40) so that the finger (37) no longer hinders the sliding of the indicator (B) in (21).

After having taken off your shoes normally at a standstill, or, after a fall, the indicator (S) abuts in an oblong hole in the body (21), causing a variation in the size of the arches formed by the cable (6) ò
A skylight, practiced in the body (21), is obstructed by a transparent plug (in). The presence of the witness (8) in front of the window indicates to the user that he can fit (the hoops formed by the cable (6) have the same dimension).

 A suitable shape, practiced in the body (21), keeps the lever (40) locked after the user has put on the shoes.

In the initial device, an adjustment makes it possible to adapt the bindings (I, II) to the size of the shoe while keeping the foot centered with respect to the edges of the board. This setting for beech performs requires:
- loosen the screws (13,14);
- To translate on the plate (1) the supports (2,5) by presenting the shoe.

- remove the shoe;
- tighten the screws (13,14);
The withdrawal of the shoe to tighten the screws <13.14) has the drawback of being able to modify the setting by inadvertently moving the supports (2.5) and the stop (3). In order to leave the shoe in place on the binding for the entire duration of the adjustment, the screws (13,14) of the initial device have been replaced by maneuvering screws (13,14) -figure 3. Access to the screw (13) is made on the front face of the support (2), thanks to an orifice made in the front stop (3) which allows the passage of a screwdriver; as for the screw (14), it is directly accessible on the rear face of the support (5). The rotation of these screws translates, respectively in the supports (2) and (5), corners (27,36); depending on the direction of translation of these corners, it is secured or separated (2) and (5) from the plate (1).

In the initial device (fig: 1,2,9), the connecting plate (1) due to its rigidity alters the torsional deformation property of the surf; to avoid this drawback, the said plate can be made in two parts.

 To allow the use of ski touring boots, having sole thicknesses different from those of ski boots and to possibly compensate for the wear of the sole, an adjustment is provided on the device modifies; it consists in varying the height between the support of the underside of the sole and the part of the stops (4) which rests on the edge of the sole. For this purpose two pads (26) provide support from below the sole and can by simple screwing into the body (2) vary this height. In order to avoid an adjustment, the adjustment of the thread of (26) with the thread of (2) is slightly tightened; only an adequate tool, exerting a sufficiently large torque, can modify the adjustment.

Claims (1)

 CLAIM  Safety binding device for ski boots on a snowboard, with asynchronous release on both feet; constitutes by two fixings (I, II) connected by a sheathed target (6,10) which crosses a system (III), the whole fixed by screws on the surf (IV); characterized in that:  - the lateral stops (4) form a vee which prevents the tip of the foot from lifting and moving laterally.  - Each stop (4) has an adequate shape which allows it to return to the initial position when the sole of the shoe presses on it.  - The front stop (3) has a shape which only serves to support the front face of the tip of the sole.  - the indexing system (23,24,25), stops (4), can be positioned along the axis XX'or YY '.  - the cable (15) is anchored at two points on the support (6).  - Skids (26), screwed into the upper part of the support - (2>, provide adjustment to adapt the binding to the thickness of the sole of the shoe.  - Corners (27-, 36) controlled by screws (13,14) immobilize the supports (2,5) on the plate (1).  - The connecting plate (1) can be made in two parts so as not to impede the torsional deformation of the surf.  - The system (III) is constituted by a body (21), in which a witness (8), integral with the target (6), may or may not slide depending on the position occupied by the lever (40), to which is linked an indexing finger (37) pushes by a spring t38); a skylight, formed in the body (21), is obstructed by a transparent plug (18); the presence of the witness (8) in front of the window indicates to the user that he can put on his shoes.